Shelf extension



- June 1 7, 1930.

F. K. WALTER SHELF EXTENSION Filed Oct. 16, 1928 Inventor Funk /f y v I "Alto'mey '5 tapered, being Patented June 17, 1930 stares FRANK K. WALTER, OF IIEINNEAPDLIS, MINNESOTA, ASSIGNOB TO JAMES H. HINE, OF NEW YORK, N. Y

SHELF EXTENSION Application filed October 16, 1928. Serial No. 812,897.

The object of this invention is to provide a new and improved form of shelf extension for use in connection with the book stack and shelves shown in the Patent No. 1,0593% is- 5 sued to James WV. Hine April 22, 1913.

Another object of the invention is to make the shelf extension so that it will form a continuation of the standard shelf used in said stack.

Another object of the invention is to make the support for said shelf so that it will engage between and be supported by the blisters the stack that are not needed for the purpose of supporting the shelves.

will be illustrated in the drawings, described in the specification and pointed out in the claims at the end thereof.

in the drawings:

Figure 1 is a perspective View of the stack with the shelf and its extension in place therein.

Figure 2 is a section on the line 2*, 2 of Figure 1. 5 Figure 3 is a top plan view of the left hand end of the shelf and the stack shown in Figure 1, the shelf and extension being shown partly broken away.

In the drawings like reference numerals indicate like parts.

In the drawings reference numeral 1 indicates the stack such as is shown in the prior patent to Hine 1,059,46. This upright is bent up from sheet steel and is V shaped or wide at the back and narrow at the front. On this stack are formed the blisters 2 and 3 arranged in two columns which blisters are formed by punching. Similar blisters are formed in the stack 4.

With these blisters engage the shelf 5 for which purpose the shelf is provided with ledges 6, 6, which ledges rest on the blisters when the shelf is in place. By moving the shelf forward until the ledges at the rear of the shelf are in line with the blank space between the column of blisters, the shelf may then be moved up or down to a new location and then pushed into place so as to engage with the blisters, and be supported thereby.

The shelves 5 are made of the standard width These and other objects of the inventionv which is substantially the width of the stack measured from front to back.

Sometimes it is desirable to have wider shelves and in such case I use the shelf of standard width and supplement it with the extension that forms the subject matter of this invention. For this purpose I provide the shelf 11 which is formed with the flanges s12, 12 bent thereon at the front and back.

On the ends are formed the uprights 13 and 1% which uprights are turned in at the bottom to form the flanges 15 and To the uprights I fasten the bars 17 which are wide enough to snugly engage between two adj acent blisters and fill the open space between them. This bar is long enough to engage between a pair of blisters in the front column and a pair of blisters in the back column of the stack. The whole combination is arranged so that the bar engages between the second and third blister of each column below the blisters that supports the shelf, to which the shelf extension is applied. The shelf extension can be applied to any shelf in the stack and can be made of any width so that the shelf is made wider thereby to correspond, the extension preferably having a with of either two of four inches.

In Figure 1 I have shown the dust proof strip 20 preferably of thin steel that is used to cover the openings made in the forming of the blisters. This strip is placed on the inside of the stack but at every fourth blister the strip is passed through the openings at the outside of the stack and then in the next opening passes back to the inside of the stack. This method of lacing the dust proof strip holds it securely in place close up against the openings formed bycthe blisters.

The stack at the right of Figure 1 is partly broken away to show this method of lacing.

I claim:

1. A shelf extension for a book stack comprising a shelf, uprights on each end of the shelf, bars fastened to the uprights and extending back therefrom under the main shelf of the stack, said bars being adapted to engage between blisters formed in the stack and hold the shelf extension on a level with and in front of a shelf.

2. The combination of a book stack having uprights, blisters thereon adapted to support shelves, a shelf resting on said blisters, a shelf extension comprising a shelf, uprights on each end of the shelf, bars fastened to the uprights and extending back therefrom under the main shelf of the stack, said bars being adapted to engage between blisters lower down on the stack than the blisters that support the shelf and hold the shelf extension on a level With and in front of the shelf.

In testimony whereof I afiix my signature.

FRANK K. WALTER. 

